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Mapa Mental
por
Fauzia Ali
, criado
more than 1 year ago
A-Level Biology (Gas Exchange) Mapa Mental sobre Gas Exchange- Insects, criado por Fauzia Ali em 24-02-2016.
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biology
gas exchange
a-level
Criado por
Fauzia Ali
quase 9 anos atrás
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4640838
mind_map
2016-02-26T18:39:12Z
Gas Exchange-
Insects
Active
Resting
Movements of abdomen ventilate
the tracheae
Ends of tracheoles fluid-filled and close
to muscle fibres
Interface where gas
exchange takes place
Oxygen dissoles in fluid and
diffues directly in muscle cells
No respiratory pigment
or blood circulation
need
CO2 diffuses reverse
Diffusion through spiracles, tracheae and
tracheoles
Same method for O2 and CO2
Problems
Live in arid so water evaporates from
body risking dehydration
Gas exchange need thin permeable surface
conflicts with water conservation
Insects therefore have waterproof layer (e.g.
exoskeleton with thin waxy layer over thick layer
of chitin and protein
Structure
Paired holes:spiracles
Branches chitin lined tubes:tracheae
Smalles tubes: tracheoles
Can open and close: reduces water loss
Hairs on spiracles: reduces
water loss and prevents solid
particles entering
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4640838
mind_map
2016-02-26T18:39:12Z
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